Tabulating machine



Dec. 10, 19-40; A. W. MILLS TABULATING MACHINE Filed Dec. 12; 1955" a Sheets-Sheet 1 INVENTOR 1e Wfl 2 ATTORNEY Dec. 10, 1940. I A. w. MILLS 2,224,770

TABULATING MACHINE Filed Dec. 12, 1956 3 Sheets-Sheet 2 mm. K inn" INVENTOB ATTORNEY -Dec. 10, 1940. A.-w. MILLS 2,224,770

k TABULATING MACHINE Filed Dec. 12, 1936 3 Sheets-Sheet s A .m- A

. |NVENTOR AT'TORNEY -Patentd Dec. 10, 1940 UNlTED STATES TABULATING MACHINE Albert W. Mills, Endicott, N. Y., assignor to International Business Machines Corporation, New

York, N. Y., a corporation of New York Application December 12, 1936, Serial No. 115,479

1 Claim.

This invention relates to tabulating machines and more particularly to the accumulating mechanism of such machines.

The invention relates more particularly to the novel arrangement of an accumulator order for the handling of twelfths or fractions whose denominators are greater than ten. The type of accumulator to which the invention is applied is that in which the several denominational orders are separate and independent units which may be separately placed in the machine for separate operation. These units are generally built on plates arranged for slidable insertion into a framework provided in the machine, and it is customary to place two denominational orders on the plate. Machines of this type are shown in U. S. Patents Nos. 1,909,549 and 1,914,285, granted May 16, 1933 and June 13, 1933 to J. R. Peirce.

The principal object of the invention is to provide'a greatly simplified accumulator unit, construction for handling of fractions whose denominator is twelve. I

Various other objects and advantages of the invention will be obvious from the following particular description of one form of mechanism embodying the invention or from an inspection of the accompanying drawings; and the invention also constitutes certain new and useful features of construction and combination of parts hereinafter set forth and claimed.

In the drawings:

Fig. 1 is a cross section of a tabulating machine showing the location of the improved accumulating unit. V

Fig. 2 is a view of one of the unit plates carrying two orders of an accumulator in which certain parts in the lower order are omittedto show the construction of the mechanism behind such omitted parts.

Fig. 3 is a detail in section of the'improved clutch device.

Fig. 4 is an outside view of the parts shown in Fig. 3.

Fig. 5 is a detailed position view of the clutching mechanism with the actuating magnet .tripped Fig. 6 is a detail taken on line 66 of Fig. 3.

The type of tabulating machine to which the present invention is applied is shown generally in Fig. 1 and may be similarto the machine shown in my copendingapplication, Ser. No. 634,454, (now Patent No. 2,079,418) filed' September 23, 1932 and the simplified and improved accumulating unit of the present invention may be readily substituted. for that disclosed in said application in positions in which it is desired to handle fractions of denominators other than ten.

In my copending application, Ser. No. 49,687,

filed November 14, 1935, (now Patent 412,165,288, -5

granted July 11, 1939) I disclose a similar form of accumulating mechanism arranged-for the handling of decimal quantities.

Referring to Fig. 1, the main drive shaft I0 is suitably driven from a motor (not shown) and 10 through gearing designated ll derives shaft I2 which has bevelled gear connection with a vertical shaft 13. This shaft in turn has bevelled gear connection with horizontal shaft I 4 which makes one revolution per cycle of the machine.

A clutch mechanism, generally designated l5, controlled by a clutch magnet 16 causesconnection of the shaft I! to the main shaft l0 through the gears designated 18. This shaft carries the cams which operate the printing section of the 20 tabulator in which type bars I0 are reciprocated to pass a platen 20 and may be interrupted at differential times during their upward movement by stop pawls 2i which are tripped under the control of trip magnets 22. After all the type bars have been positioned, printing hammers 23 are tripped to take an impression. I

The shafts l4 carry gears 24 which are in constant rotation. Meshing with each gear 24 is agear 25 (see Fig. 2) which is freely mounted on a post 26 secured in plate 21. The plate carries two gears 25 to provide for two denominational orders of an accumulating unit. As shown in Fig. 1, the plate 21 is horizontally slidable with its gears 25 away from the gears 24 and in this manner the plate 2'! with the mechanism mounted thereon may be removed from the machine for repair or replacement. As viewed in Figs. 3 and 6, the gear 25 has secured thereto pins 29 which extend into openings 3| in a ratchet 32. The ratchet 32 is freely mounted on the member 33 and is normally held against the portion 45 thereof as shown in Fig.3 by a multi-blade leaf which is parallel to the axis of the post, but eccentric with respect thereto. Into' this opening extends a shaft 33a upon the extremity of which is integral therewith a disk 33b to which is rivspring 34. The post 26 has an opening therein eted the accumulating wheel 35 whichv is provided teeth 36 of the accumulating wheel are tangent 5 ing ratchet the accumulating wheel will be driven.

to the same plane at a point above and to the right of the post 24 as viewed in Fig. 5. At this point the teeth of the ratchet may be moved into engagement with the teeth of the accumulating wheel so that the latter may be driven thereby when rocked as shown in Fig. 4. This rocking is effected by means of a bevelled disk 38 which, when shifted from'the position in Fig. 3 to that of Fig. 4, cams the adjoining edge of the ratchet 32 into engagement with teeth 36, in this manner driving the latter. The relationship of the parts is such'that for one tooth movement of the driv- .one twenty-fourth of a revolution.

The accumulating wheel is normally locked by detenting arm 39 whose free end rests between two adjacent teeth 31 and affords a positive restraint against movement of the wheel in either direction. The arm 39 is pivoted on stud 40 and has pin and slot connection 4| with the supporting arm 42 of the bevelled disk 38. A spring 43 connected between the arms serves to hold arm 39 in engagement with wheel 35. Upon counterclockwise rocking of arm 42 the bevelled disk will cause engagement of the ratchet 32 with the teeth 36 and at the same time the pin and slot connection 4| will cause withdrawal of the arm 39 from between teeth 31. The proportio'ning of the parts is such that partial engagement of the ratchets is effected before the arm 39 is fully disengaged to insure that the wheel is controlled by either one or the other. With the clutch engaged, the parts assume the position shown in Fig. 5 where the arm 42 rests against a fixed member 44. The parts will remain in this position to drive the accumulating wheel until the arm 42 is again rocked clockwise to its original position. This may be effected by cam rollers 45a (see Fig. 2) which are carried by the driving gear 25. The cam rollers engage an extension 46 of the arm 42' and cause positive rocking of the latter. During such rocking, the arm 39 is brought into engagement with the teeth 31 preventing further rotation thereof. 45 Referring now to Fig. 4, the teeth 36 and the ment of the ratchet 32 will cause the ratchet to be cammed out of engagement with the teeth I 31 and held out of engagement by the leaf spring 34.

The initial rocking of the arm 42 is controlled by a pair of magnets 41, which, upon energization, attract the armature 43 to release a lateral extension of arm 42, whereupon spring 49 will rock the arm 42 in a counterclockwise direction.

A second pair of magnets 59 is provided which acts on its armature 5| to release lever 52 pivoted at 53. The lever 52 carries a pin 54 which, when the lever is released, will be drawn downwardly by spring 49 to engage and rock the arm 42 clockwise. It will thus be seen that the accumulating wheel 35 may be clutched to the driving ratchet 32 when the magnet 41 is energized and depivoted at ill. The arrangement is such that while the accumulating wheel registers "11," flnger 53 will be in engagement with a notch 53 and through the insulating bar 6 l the lever carrying brush 63 will be permitted to rock under control of its spring 64 so that the brush 63 makes contact with a contact member 65. When the wheel passes from 11 to 0, the finger 58 will be engaged by an extension 51 and rockedclockwise to a position in which it is held by a springpressed latch 66. Inthis position, the bar 6| will have rocked the arm 62 so that brush 63 makes contact with the upper contact member 61. This position of the brush B3 is maintained until the roller 68 carried by the gear 25 (see Figs. 3 and 4) causes unlatching. A cam roller 13 (Fig. 2) is provided to effect restoration of lever 52.

The construction and operation of the accumulating unit has been described in detail and a brief explanation will now be given to indicate the manner in which the parts are timed in relation-to the rest of the machine. a

The manner in which circuits are controlled to enter twelfths in an accumulator is set forth in more detail in the copending applications of E. J. Rabenda, Serial Nos. 725,837 (now Patent No. 2,076,743) and 1,087 (now Patent No. 2,076,- 144), filed May 16, 1934 and January 10, 1935, respectively, in which it is explained that if a nine isto be added, the circuit to the magnet 41 is completed at the nine time and wheel 35 is rotated through nine steps at which time the cam roller 45a will cause disengagement of the clutch. When ten twelfths are to be added, the magnet 41 is energized one step in advance of the nine time and wheel 35 is rotated through ten-steps. at which time the cam roller 45a will cause disengagement of the clutch. Further, if eleven twelfths are to be added, the magnet 41 is energized two steps in advance of the nine time and the accumulating wheel 35 will be advanced eleven steps before the cam'roller 45a effects disengagement. It is thus seen that the time of engagement is variable and the knock-out or disengaging time occurs at a fixed point in the cycle. In the interval between the two camming rollers 45a, carry operations take place under control of the contacts 63, 65, 61 to add a unit into appropriate orders. The time of completition of this carry circuit is one point before the second camming roller efi'ects clutch disengagement.

The applications referred to also set forth in full detail the controlling circuits for controllin magnets 41 and 50 to efiect subtracting and total printing operations. As these functions do not enter into the invention, they need not be set substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention therefore to be limited only as indicated by thescope of the following claim.

What is claimed is as follows:

In an adding-unit for a tabulating machine, a supporting plate, a constantly rotating driving member, an axle therefor supported by said plate, said member having a ring of face teeth a driven member having a ring of face teeth spaced from and facing the first 'nam'ed ring of teeth, said rings of teeth being of different diameters,

' an axle for said driven member, supported by easement at a. fixed time in said revolution whereby the driven member will be rotated an 7 amount determined by the ratio of the diameters of the rings of teeth and the period 01' engage- 1 5 'ALBERTw MIhLS I ment ot'the members. i 

